revision physics

revision physics

1. electromagnetic wave

   • is a wave that transfers energy-it can travel through a vacuum and travels at the speed of light

2. electromagnetic spectrum

   • is electromagnetic waves ordered according to wavelength and frequency - ranging from radio waves to gamma waves

3. visible spectrum

   • is the group of electromagnetic waves that we can see

4. infrared

   • is the part of the electromagnetic spectrum that slightly shorter wavelength than the visible spectrum

5. radio waves

   • have a long wavelength and are used for communication

6. RICH MONKEYS IN VEGAS USE X'S GROSLY

   • RADIO, MICROWAVES, INFRARED, VISIBLE LIGHT, ULTRAVIOLET, X-RAYS, GAMMA-RAYS

7. ALL WAVES TRAVEL AT THE SAME SPEED IN SPACE

8. Radio Waves - broadcasting aqnd communications

9. microwaves- cooking and satellite transmissions

10. infrared - heating and night vision equipment

11. visible light- optical fibres and photography

12. ultraviolet-flurorescent lamps

13. x-rays- observing internal structures of objects and medical uses

14. gamma- sterilising food and medical equipment

15. danagers-

    • microwaves- internal heating of body tissue
    • infrared - skin burns
    • ultraviolet- damage to surface cells and vlindness
    • gamma- cancer, cell mutation